We are a Managed Services Provider in the Philadelphia area that specializes in moving clients to the cloud. As part of our Cloud Stack, we heavily deploy AWS technologies including EC2. I personally manages multiple AWS accounts that all have EC2 instances in both development and production. EC2 tackles a huge problem when it comes to right-sizing your servers. With EC2, we can spin up a server in the cloud for a client, let them test it, and if it turns out the specs aren't right, within 5 minutes we can have everything changed to a completely different set of specs.